Final answer:
The white-tailed ptarmigan inhabits alpine and subalpine habitats, such as the Rocky Mountains, where they are camouflaged by their seasonal plumage changes.
Step-by-step explanation:
The white-tailed ptarmigan is found in B. Alpine and subalpine habitats. These birds are adapted to life in high elevation environments such as the Rocky Mountains of North America. They blend into their environment with seasonal plumage that changes color to match the surrounding landscape, white in winter to blend with snow, and mottled brown during the summer months.